Objective 1
1 fahrenheit/kelvin/celsius
2 Thermal energy is the total energy of all particles in a substance. It can be transferred from one substance to another and change its temperature and make it hotter.
3 Specific heat is the ratio of the amount of heat it takes to raise the temperature of a substance by a certain amount in relation to a reference material such as water. A high specific heat would mean it takes more heat to raise the temperature of that substance compared to the same amount of water.
4 Thermal energy from your hand moves to the ice cube and it melts.
5 Things that are insulators trap heat or cold and block the transfer of thermal energy.(heat flow)
Objective 2
1 Coldness or heat moves from the object to the thermometer and it measures how hot or how cold the object is.
2 They all measure temperature but all in different ways.
3 41 degrees fahrenheit
4 460 degrees celsius
5 209,000 kelvins
Objective 3
1 conduction convection radiation
2 heat moves to places that dont have a lot of heat
3 conductors make it easier for energy to move through and insulators make it harder
4 a copper pipe because it has a lot of free electrons
5 a fire would keep the air around me and me warm (air is best insulator)
Objective 4
1 temperature makes matter change to a different state
2 when thermal energy increases matter heats up and changes state
3 the temperature stays the same cuz its changing state
Thursday, November 18, 2010
Wednesday, November 10, 2010
homework for november 11
Objective 1
1 mass is more usefull because weight changes depending where you are and mass always stays the same
2 619.65 cm cubed is the volume
3 commonly used units for density are grams over cm cubed or Pa which are really grams over ml cubed
4 d= m over v
5 v=l x w x h
Objective 2
1 the difference between a chemical change and a physical change is that during a chemical change the substance's chemicals change but during a physical change the substance's chemicals stay the same
2 spontaneous, heat, light, and energy
3 mass is constant
4 temperture is similar to energy but isnt actually energy
5 endothermic reactions create cold and exothermic reactions create warmth
Objective 3
1 chemical energy the atoms are sharing electrons
2 a skateboard rolling down the street has kinetic energy
3 a pencil sitting on a table has potential energy
4 electromagnetic energy has to do with waves
5 electrons moving is electricity
Objective 4
1 particles that are warm move fast and particles that are cold move slow
2 the ice cream changes states of matter it starts to absorb the heat
3 when heat is added particles vibrate when the particles are cool they vibrate only a little
4 condensation happens when hot and cold air come together
5 Sublimation happens when a solid changes to a gas
Objective 5
1 Boyle's law when volume goes up pressure goes down and the other way around
2 lower pressure would cause the ballon to burst
3 PV=K
4 breathing in increases the volume of the lungs
5 when the diver goes deeper the pressure increases Boyle's law states as pressure increases volume will go down
1 mass is more usefull because weight changes depending where you are and mass always stays the same
2 619.65 cm cubed is the volume
3 commonly used units for density are grams over cm cubed or Pa which are really grams over ml cubed
4 d= m over v
5 v=l x w x h
Objective 2
1 the difference between a chemical change and a physical change is that during a chemical change the substance's chemicals change but during a physical change the substance's chemicals stay the same
2 spontaneous, heat, light, and energy
3 mass is constant
4 temperture is similar to energy but isnt actually energy
5 endothermic reactions create cold and exothermic reactions create warmth
Objective 3
1 chemical energy the atoms are sharing electrons
2 a skateboard rolling down the street has kinetic energy
3 a pencil sitting on a table has potential energy
4 electromagnetic energy has to do with waves
5 electrons moving is electricity
Objective 4
1 particles that are warm move fast and particles that are cold move slow
2 the ice cream changes states of matter it starts to absorb the heat
3 when heat is added particles vibrate when the particles are cool they vibrate only a little
4 condensation happens when hot and cold air come together
5 Sublimation happens when a solid changes to a gas
Objective 5
1 Boyle's law when volume goes up pressure goes down and the other way around
2 lower pressure would cause the ballon to burst
3 PV=K
4 breathing in increases the volume of the lungs
5 when the diver goes deeper the pressure increases Boyle's law states as pressure increases volume will go down
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